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A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations.
United States hardiness zones (USDA scale), European hardiness zones & Macaronesia
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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Hardiness zone | is a | geographic area defined as having a certain average annual minimum temperature | 0.90 | text |
| elevation or large bodies of water | instance of | and is able to show local variations due to factors | 0.80 | text |
| frost dates | instance of | since factors | 0.80 | text |
| frequency of snow cover can vary widely between regions | instance of | since factors | 0.80 | text |
| the subtropical coastal areas of the southeastern US | instance of | 9 include regions | 0.80 | text |
| Mojave | instance of | 9 include regions | 0.80 | text |
| Chihuahuan inland deserts | instance of | 9 include regions | 0.80 | text |
| thus an American gardener in such an area may only have to plan for several nights of cold temperatures per year | instance of | 9 include regions | 0.80 | text |
| while their British counterpart may have to plan for several months.In addition | instance of | 9 include regions | 0.80 | text |
| the zones do not incorporate any information about duration of cold temperatures | instance of | 9 include regions | 0.80 | text |
| summer temperatures | instance of | 9 include regions | 0.80 | text |
| or sun intensity insolation | instance of | 9 include regions | 0.80 | text |
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